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Finding the Fourth Proportional to 285,938.70, 428,778.45 and 108,386.70

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Solution

The fourth proportional to 285,938.70, 428,778.45 and 108,386.70 is: 162,530.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,938.70 : 428,778.45 = 108,386.70 : x
  2. Step 2: Convert to fraction form
    285,938.70/428,778.45 = 108,386.70/x
  3. Step 3: Cross multiply
    285,938.70x = 428,778.45 × 108,386.70
  4. Step 4: Simplify right side
    285,938.70x = 46,473,881,226.62
  5. Step 5: Solve for x
    x = 46,473,881,226.62/285,938.70
  6. Step 6: Final answer
    x = 162,530.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.